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MULTI V S System Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.  
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Indoor Unit Central Control Address Assignments
A central control address is made up of two hexadecimal characters. 
• The first character in the central control address is the Hex Group Identifier.  
Possible Hex Group Identifiers (in order of lowest to highest) are 0-9 followed by A-F.
• 7KHVHFRQGFKDUDFWHULQWKHDGGUHVVLVWKH+H[0HPEHU,GHQWLILHULQD+H[*URXS 
+H[0HPEHU,GHQWLILHUVLQRUGHUIURPORZHVWWRKLJKHVWDUHIROORZHGE\$)
Figure 66: Central Control Address Nomenclature.
1 '
)LUVWFKDUDFWHULV
WKH+H[*URXS 
,GHQWLILHU) 
([DPSOH*URXS
Second character 
LVWKH+H[0HPEHU
,GHQWLILHU) 
([DPSOH8QLW
+H[$GGUHVV$VVLJQPHQW/LPLWDWLRQV
• 7KHUHLVDOLPLWRI0HPEHUVSHU+H[*URXS
• There is a limit of 16 Hex Groups per VRF system.
• 7KHUHLVDOLPLWRISRVVLEOH0HPEHU,GHQWLILHUVSHU&HQWUDO
Control (See Central Controller Communications Limitations).
+H[*URXS
,GHQWLÀHU1R
+H[0HPEHU
,GHQWLÀHU1R
,GHQWLÀHU5DQJH
0 0 00~0F
1 1 10~1F
2 2 20~2F
3 3 30~3F
4 4 40~4F
5 5 50~5F
6 6 60~6F
7 7 70~7F
8 8 80~8F
9 9 90~9F
A A A0~AF
B B B0~BF
C C C0~CF
D D D0~DF
E E E0~EF
F F F0~FF
Table 36: &HQWUDO&RQWUROOHU,GHQWL¿HU7DEOH
Table 37: Central Controller Indoor Unit Connection Limitations.
Central Controller Communications Limitations
Each type of Central Controller device is designed to communicate 
with a limited quantity of indoor units. The quantity of indoor units 
that can be connected to a single central control communications 
cable, therefore, will be defined by the central control device on that 
FDEOHZLWKWKHVPDOOHVW0D[LPXP,QGRRU8QLW4XDQWLW\DVVKRZQ
&HQWUDO&RQWURO'HYLFH 0D[LPXP,QGRRU8QLW4XDQWLW\
AC Smart IV 128
AC Smart BACnet
®
 Gateway* 128
ACP IV BACnet™ Gateway* 256
LonWorks™ Gateway* 64
Advanced Control Platform IV 256
* BACnet
70
 is a trademark of ASHRAE; LonWorks
70
 is a trademark of Echlelon Corporation.
Group Number
,IWKHEXLOGLQJRSHUDWRUZDQWVWRNQRZZKLFKLQGRRUXQLWVDUHRQHDFK0XOWL96XQLWDQGPXOWLSOHV\VWHPVVHUYHDEXLOGLQJ
• Assign a Group Number to each system. If there are more than 16 indoor units on a system, multiple Group Numbers may be necessary.
 
If the building owner wants to know which indoor units are on each floor:
• Assign a different group number for each floor. If there are more than 16 indoor units on a floor, multiple Group Numbers may be  
necessary.
Member Number
Can be assigned at will or for example, can follow the room layout on each floor. 
For each LG Central Controller product provided on the project, devise a central control address schedule and assign a central control 
address to each indoor unit(s) Hydro Kit(s), and ERV(s) units. Record this central control address for each component in the column provided 
on the Pre-commissioning Device Configuration Worksheet. 
WIRING
Group Addressing